Door-lock.



S. H. CLARKE.

DOR LOCK.

APPLwATIoN FILED AP11.13, 1911.

1,061,449. Patented May 13, 1913.

S. H. CLARKE.

DOOR LOCK.

APPLIGATION FILED 11113.13, 1911.

1,061,449. Patented May 13, 1913.

z SHEETS-SHEET z.

WTNESSES i NVEIYTOR M ,yamueZ E lar/e.

l Ailormry SAMUEL HERBERT CLARKE, OF RICHMOND, VIRGINIA.

DOOR-LOCK.

To all 'who/m, 't may concern:

Be it known that I, SAMUEL HERBERT CLARKE, a citizen of the United States, residing at Richmond, in the county of Henrico and State of Virginia, have invented certain new and useful Improvements in Door-Locks, of which the following is a specication.

This invention `relates to door locks, particularly locks for elevator doors.

One object is to provide a lock for elevator doors embodying such characteristics that the door can be unlocked only when the elevator car is at the landing at which the door is located and to insure locking of the door when the car moves away from the door so as to avoid accidents which fre quent-ly occur by failure of the car operator to close the door when leaving alanding. Another object resides in the provision of an elevator door lock embodyingV among other characteristics features whereby the car cannot move away from a landing at which a door is left open.

A still further object is to provide a lock mechanism for electric elevator doors embodying means whereby the mechanism may assume locking position prior to closing the electric circuit and whereby the circuit may be opened prior to unlocking the mechanism to insure the door being locked whether the circuit is open or closed.

lVith the above and other objects in view, the present invention consists in the construction and arrangement of part-s hereinafter more fully described, illustrated in the accompanying drawings and particularly pointed out in the appended claims, it being understood that changes may be made in the form, proportion, size and minor de tails wit-hout departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings :-Figure l is a longitudinal sectional view of the latch mechanism. Fig. 1I1 is a longitudinal' sectional view of the keeper-mechanism- Fig. 2 is a sectional view of the device in locked position. Fig. 3 is an end view of the keepercasing. Fig. 8 is an end view of a port-ion of an elevator car having a projection to opcratev vthe lock mechanism. Fig. 4 is another end view showing the keeper-casing showing the lateral projection of the latch bolt turned in the socket of the rotatable member. Fig. 5 is a cross sectional view on Specification of Letters Patent.

Application led April 13, 1911.

Patented May 13, 1913.

Serial No. 620,959.

the line a-a of Fig. 1a. Fig. 6 is a cross sectional view on the line bm?) of Fig. l'. Fig. 7 is an end view of the latch casing.

Referring now more particularly to the accompanying drawings, the reference .character 10 indicates a keeper-casing that is secured in any suit-able manner to the framework of the elevator shaft and provided at one end with a segmental or other form of latch-bolt receiving-opening 11.

In the keeper-casing is located any suitable type of switch mechanism. For purposes of illustration I disclosepne form of switch mechanism which may be employed for the purpose of making and breaking the electric circuit under the influence of which the operation of the elevator car (not shown) may be run. In the form illus trated, the characters 15 and 1G indicate terminals suitably insulated from the casing 10, and to the terminal 16 is pivotally connected at 17 a switch lever 18 which is adapted to be moved into and out of engagement with the contact 15 to make and break said circuit. It will thus be understood that I do not limit myself to the use of any particular means for making and breaking the circuit as any suitable type of mechanism may be used for the purpose without departing from the spirit of my in vention.

The character 19 indicates a member mounted loosely in the keeper-casing for rotation therein adjacent the aforesaid opening 11 of the keeper-casing. On one side of this rotatable member 19 is a socket 2O of a segmental outline or of any form conforming preferably to the shape of the aforesaid opening 11 of the keeper-casing. This socket is adapted to be thrown into and out of alinement with the opening 11 as will be explained and on the opposite side of the rotatable member 19 is a screw threaded socket 21 adapted to receive the screw threaded head 22 of the switch operating bar 23, `which latter has a ortion 23 of insulated material which is slidably and pivotally connected at 24 to the knife or lever 18 of the switch mechanism so that as the rotatable member 19is rotated in a manner to be hereinafter explained the lever 18 may be moved upon its pivot 17 into and out of engagement with the contact 15 to make and break the circuit, because, under the influence of the rotatable member, the connecting bar 23 is caused to reciprotti titi

cate incident to the screw threaded connection between the head 22 of the bar and the screw threaded socket of the rotatable member 19.

To insure proper coperation of the blade 18 with the yterminal 15 it is preferred that a guidel opening be formed n the parti-` t-ion 10a through which the bar 23 slides freely, said partition being preferably of insulating material and substantially isolating the switch mechanism from the other operative parts.

The character 25 indicates a latch-casing provided at its top with a slot or opening 26 and at one end has an opening 27 through which projects a latch-bolt 28 journaled at its inner end in a support 29 and at its inner end adjacent said supporthaving a beveled gear 30 adapted to mesh with the beveled gear 31 journaled in the latch casing 25 on the axis 32.

The beveled gear 31 is the operating one of the two gears described and in order that it maybe operated it is provided with a lever 12 which extends through the aforesaid slot or opening 26 in the`latch casing and at its outer end preferably provided with a handle 34 so that the lever may be moved forwardly in said slot 26 to rotate thei gear 31 for the purpose of rotating the latch-bolt through the medium of the meshing connection between the gears 30 and 31. At the outer end of the latch-bolt is formed a. lateral projection 35 which is preferably of the same formation as the shape of the opening 11 and socket 20 and which is adapted to pass through the opening 11 and into the socket 20 when 'the door, which carries the latch-casing, is moved to the jamb of the door opening at which the keeper casing is located. When the lateral` projection of the latch-bolt enters said socket' 20, the latch-,bolt may be rotated by moving the aforesaid lever so as to cause rotation of the latch-bolt to cause the lateral projection ofthe latch-bolt to lie across the opening 11, behind the latter, to prevent opening of the door. This operation of the latch-bolt, by virtue of its lateral projection fitting in the socket 20 of the rotatable member, causes the latter to rotate, and by virtue of the screw threaded connection between the socket 21 and the head 22 of the switch operating bar23, the latter is caused to slide and effect such movement of the switch lever 18 as will cause the latter to engage theterminal 15 and thereby close the circuit under the influence of which the car is runso that the latter may be moved away from the landing at which the particular door is located. The car cannot move while the circuit is broken but when the circuit ismade the car may be moved up' or down in its shaft.

To prevent turning of the latch bolt 28,

' the weinte when the door of the elevator car is being moved to closed position by the operator if he grasps the handle 34 to close the door, there is slidably mounted in the latch casing a bolt 36 which projects normally through the front of the latch casing, and which, at

`its inner end, ,has a lateral projection -38 designed to engage the shoulder 39 on the beveled gear 31 to prevent rotation of the latter as the operator slides the door. The moment that the outer end of the bolt 36 engages the forward end of the keeper-casing 10, however, the bolt 36 is forced inwardly against the action of the spring 37 so as to clear its lateral projection 38 of the shoulder 39 on the operating gear 31 and thereby permit the latter to turn and to cause corresponding turning of the latch-bolt to edect turning ofthe rotatable member and a' con` sequent-positioning of the laterall projection of the latch-bolt with relation to the opening 11 of the {eeper-,casing to insure locking of the door. Thus by a single stroke of the hand of the car operator 'lthe' latchboltf28 is thrown into the socket 20 of the rotatable member 19 and as soon as the lateral projection ,35 ofthe latch-bolt enters said socket 20 of the rotatable member 19, a slight continuation of the stroke of the hand of the car operator causes the latchbolt 28 to turn with the result that the lateral projection 35 thereof will lie acrossthe opening 11 behind the latter as indicated in dotted lines in Fig. 4 .so that the door becomeslocked and the car may lthen pass up or 'down under the influence of the controlling mechanism of the car (not shown) When the door is locked and the car is moved away from the door the latter cannot be opened until the car returns and in order to insure against opening of the door by unauthorized persons 1 preferably provide the rotatable member 19 with an annular groove 40 preferably in the bottom of whichA are teeth 41, one of which teeth is engaged by awl' 42 pivoted at 44 in the recess 45 of t e keeper-casing. To the` outer end of the pawl 42 is pivotally and slidably connected the arm 46 of the double arm lever A47 pivoted at 14 on the ear.50 and whose sired a spring 52' may bear upon the' pawl 42 to insure its engagement with the teeth 41, but this spring may be dispensed with by havin-g the double arm lever 47 so mounted that it will by gravity throwv the pawl into engagement with the said teeth. -1

While l have just described means whereby the lock cannot be unfastened until the car reaches the landingat which the lock is located, it will beunderstood that any other common means may be substituted therefor, the particular means illustrated for this purincinte pose being shown in order to illustrate some form oit operative connection for the purpose specified. It will thus be seen that the locking operation of my improved lock takes place prior to the closing of the circuit, because the minute that the rotatable member 19 is rotated, with the lateral projection 35 of the latch-bolt 28 in the socket 90, the lateral projection passes out of registration with the opening l1 and by continued movement of the rotatable member 19, the switch lever 18 is finally thrown into cooperative relation with the terminal 15, closing the circuit. It will also be seen that the circuit opens prior to the unlocking operation, because the lever 18 is withdrawn from the terminal 15 prior to the timethat the lateral projection 35 of the latch-bolt 28 coincides with the opening 11, whereby the door is locked all the time the current is on or circuit closed and will not be unlocked until the circuit is opened.

What is claimed is l. The combination with a latch-casing, a rotatable latch-bolt in the casing, and means for operatin the latch-bolt; of a keepercasing provi ed with an opening in one end to receive the latch-bolt, a switch mechanism mounted in the keeper-casing, a rotatable member mounted in the keeper-casing and provided on its side adjacent the opening of the casing with a recess to receive the outer end of the latch-bolt and on its opposite side having a screw threaded socket, and a bar connectedto the switch and provided with a threaded head having working lit in the screw threaded socket of the rotatable member so that upon rotation of the latter under the inuence of the aforesaid latch bolt operating means the switch may be opened or closed.

2. Thecombination with a latch-casing, a rotatable latch-bolt, and means for operatin the latch-bolt, of a keeper-casing provided with an opening in one end to receive the latch-bolt, a switch mechanism in the keeper-casing, a rotatable member mounted in the keeper-casing for engagement by the latch-bolt, the aforesaid operating means being capable of effecting rotation of the rotatable member when the latch-bolt is in engagement with the latter and rotated in the same direction as the latch bolt and an operative connection between the rotatable member and said switch mechanism to operate the latter upon rotation of the rotatable member.

3. The combination with a latch-casing, a rotatable latch-bolt provided at its outer end with a lateral projection, and means for operating the latch-bolt, of a keeper-casing provided with an o ening in one end to receive the latch-bo t, a rotatable member mounted in the keeper casing adjacent said opening and on its side adjacent the opening having a socket adapted to be thrown into and out ol alincment with said opening, said socket heilig adapted to receive the lateral projection of the latch-bolt and the rotatable member being rotatable under the influence of the latch-bolt and in the same direction of rotation as the latch-bolt when the latter is turned, and a switch mechanism connected with the rotatable member and operable when the rotatable member is rotated.

Ll. The combination with a latch-casing, a latch-bolt in said casing, and means for rotating the latch-bolt, ot' a keeper-casing provided with an opening to receive the latchbolt, a rotatable member in the keeper-casing adapted to be engaged by the latchbolt when the latter has entered the keeper casing and to have operative connection therewith to rotate it axially, a switch mechanism, means connecting the switch mechanism and the rotatable member for operating the former when the latter is rotated, and means tor preventing rotation of the bolt prior to its operative connection with said rotatable member.

5. In a lock for elevator doors, a keepercasing, a switch mechanism in said casing, a rotatable :member in the casingr and operatively connected to the switch mechanism, a latch casing, a lateh-bolt in the latch-casing, means for operativelyY connecting'the latch bolt with said' rotatable member, means` for .preventing rotation oit' the bolt prior to its operative connection with the rotatable member, and means for detachably securing the bolt and rotatable member against rotation after the lock is in operative locked condition.

t3. In a lock for elevator doors, a keepercasing provided with a partition having a central opening, a switch mechanism in said casing on one side of said partition, a rotatable member in the casing on the opposite side of the partition and having a screw threaded socket, an operating rod extending through the perforation in said partition and operatively connected to said switch mechanism and having a screw threaded head operative in the screw threaded socket of the rotatable member, a latch casing, a latch-bolt in the latch casing, and means for operatively connecting the latch-bolt with said rotatable member to effect locking and unlocking of the lock and to operate said switch mechanism.

7. In a lock for elevator doors, a keepercasing provided with a partition having a central opening, a switch mechanism in said casing on one side of said partition, a rotatable member in the casing on the opposite side of the partition and having a screw threaded socket, an operating rod extending through the perforation in said partition and 4operatively connected to said switch mechanism and' having a screw fthneaded head operative :in the screw threaded:y socket of the rotatablemember, a =latch;'casing,fa latch-bolt in tiny-latch 'casing,nieansfor"o erative'ly connecting the latchabolt' `with said rotatable member i to lnect -f locking-` and s nnlocking .f the lock' and to voperate .said switch mechanism, and :'rneans for 1 detachably securing the rotatable member against rotation after thelock isin operative locked position.

'8. rlhe combinationwithalatchcasing, a rotatablel latch boltt ini said4 casing provided with a head, and 'xmeans'for l*opera-tingthe latch bolt, of. a. keeper-casing: provided with an opening ceivefthe head ofithe latch bolt, a' rotat wlewinemberiin they keeper casing provided with-,a socket to, receive 'athe head of thelatch';fhclt,\ ai switch.-mechanism7 said rotatable member having another soc-liet, a connectionfbetween v@said 'ether `sochet of the 'rotatableqmember and the switch mechanisms and l'icbispcsed inaaline- 'ment with the latchbolt .and the'rotatable Vmember and operableinnder the inlnence of said rotatable memberxwhen 4.the latch bolt rotates thelatter.

9. ln: alockffor elevator doors, a keepercasing, a switchrinechanism'in said casing, a

rotatable memberfin the casingaanol veneratively 'connected v'to fthe z switchfmechanism, a latch casing,-a Alatch-bolt'in the latchxcasing, means for loperativeljv connecting'the latch-bolt with; said rotatable:member,` said rotatable` member having. a .-screwthreaded socket, and a connection-between the switch mechanism andthescrew threadedsochetfof the rotatableimember touchent opcningwand closing of the switch.

.10. ln a.` loch'meehanism f ici`- elevator.

(doors, a latch casing,'zalatchbolt insaid casing, and means iorioperating 'the-latchbolt, ofia keeper-casing provided-'withian opening toreceive the latch-bolt, a yrotatable member in the keeper casingl adapted. to be engaged-by the latch-bolt :when the latter has entered the keeperacasing and to have operative f conne'ntion ytherewith to `eifect locking of the lock,.\aswitch mechanism, anda connection between the: switch mechanism and the rotatable memliier--movalole 'in the line ot the axis of the latter forclosing the switclr-subsequentito :the initialumofvement of the rotatablemember.

11... rlhe f combination with i a latch casing,

v a rotatable latch bolt insaid casin ,zand

- ica means for rotatingtherlatch bolt, of a eeper casing .providedwith .an opening -to receive the' latch .bclt,.- a rotatable member in the vkeeper casing' adaptedf'to be. engaged l by the rotatable Y. latch bolt rwhen .the latter has en tered theulieeper casing .and to zhave 'operative connection therewith -tovrotate'with :the rotatable member, av switch mechanism and a -connecticnfbetween-.the switch mechanism a-,cervaee i. and the' rotatable 'member`A foirlreciprocation bodily. vimrv a longitudinal" directionto open .and close jsaid-switch, said rotatable memfrctatable members-f and theswitch 'mechanismibeing disposedfin axial: alineme'nt.

.12. i-hoz combination'with ai latch casing, Tatrotatable latch boltin said casing, and Vmeansv for rotating -said :latch bolt, of a ilieeper 'casing provided'with an opening to receive said :latch bolt," aA rotatable member -in the; keeper .casing adapted to be Yengaged -by vthe: latch .bolt fwhen the latter has entered thelreepercasing. and to have operative con- -nectionptherewithso thatlthe latch bolt and therotatablefmember may. be' rotated: axially in' the 4sanne* direction, f af 'switch L mechanism, and: means connecting the lswitch."mechanism 1 andtheirotatabletmember oftheheeper casring' so that upon rotation Y ofithe'- latch bolt i.. and the rotatable member the switch mechanism may be operated.

13. lfhe combinationwithcheaper-casing, fot atrotatable'I membermonnted therein, a

switch mechanism andfthe rotatable member fand: af-rotatablealatch-'bolt arranged' for oper'- v ative connection with said rotatable member and adaptedtoirotate onithe same-longitudithe latter and' operate said` switch vmechanism.

da. .Theeombin'atiion'with a' keeper casing, :of: a-rotatableamember mounted therein, a switch mechanism-,f a connection between the switch) mechanism andthe rotatable member anda rotatable latch-bolt arranged for operative connection-'with said rotatable'memben and-adapted to rotate -1onthe same longitndinal anis as therotatablemember to rotate the latter and operate said switch mechanisnnfand means for preventing rotation of -the :latch lbolt prior to its operative .connection `with the rotatable'member.'`

. l5. .'lhef `comhiiiiatiomwith: aryheeper casing, loit a= rotatable -member mounted therein, a switch mechanism, a connection between the -switchmechanisnr and the rotatable member anda yrotatable:latch. bolt arranged for operand adapted ftof 'rotate .on the-.same longitudinal axis as the -rotatablememb'er to rotate vthe latter and operatesaid switch mecha- Jni'sm, 1' means for preventing rotation of the .with the Yrotatable `niemberyandmeans for 'member .against rotation lafter the lock'is in 'operative locked condition,

of .a rotatable member mounted therein, a switchmechanism, a connection between the switch mechanism and ithe rotatable'member 4anda rotatable latch bolt arranged` for operative connection lwith said rotatable'members afnd'saidI connection between fone ofthe switch mechanism,v a connection between the nali amisras'the rotatable vmember 'to' rotate.

ativey connection with said4 rotatable member l,

latch` bolt prior to its operative-connection 16. The combination with. akeeper 'casingf detachably securing the bolt and mtatable ber and adapted to rotate on the same longi- In testimon whereof I atx my signature tudinal axis as the rotatable member to roin presence o two witnesses.

tate the latter and o erate said switch mechanism, and means or detachably securing SAMUEL HERBERT CLARKE 5 the bolt and rotatable member a ainst rota- Witnesses:

tion after the lock is in operative ocked con- JAB. W. BBoAnDUs dition and the switch closed. WALTER HELPER OBB. 

